The inscription looks like 91A
See part 2 for the liner that came with this helmet.
Lots of information about the M1 at:
http://www.warrelics.eu/forum/us-m1-steel-helmet-forum/rough-guide-us-m-1-m-2-m-1c-shell-22931/
and
https://jmurrayinc1944.com/blogs/education/m1-helmet-lot-numbers
and
https://cdn.shopify.com/s/files/1/1065/6146/files/MC_H_Vol_70_No3_M1_Helmet_Lot_Nos.pdf?3737742651470471381
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Helmliefhebber, Posté le mercredi 07 août 2019 18:34
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